4-inch diameter Grateful Dead - Steal Your Face extra-large drink coaster.
Each color is its own part so coloring is very easy. Just assign the colors to the parts.
The coaster is 3mm thick and the colors are .84mm thick, so printing with 0.28mm layer height gives 3 layers of color. I printed it solid using 10 bottom layers and 3 top layers.
It's set to print face-down using textured PEI build-plate.